| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Knez, Daniel
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (48/48 displayed)
- 2024Nanoscale, surface-confined phase separation by electron beam induced oxidationcitations
- 2024Three-dimensional distribution of individual atoms in the channels of beryl
- 2024Three-dimensional distribution of individual atoms in the channels of berylcitations
- 2024Phase Transitions and Ion Transport in Lithium Iron Phosphate by Atomic‐Scale Analysis to Elucidate Insertion and Extraction Processes in Li‐Ion Batteriescitations
- 2024Challenges and advances regarding LiVPO4: From HR-STEM & EELS to novel scanning diffraction techniques
- 2024STEM exploration of 2DEG at TiO2/LaAlO3 interface
- 2024Gas-Phase Synthesis of Iron Silicide Nanostructures Using a Single-Source Precursorcitations
- 2024Pulsed Laser Deposition using high-power Nd:YAG laser source operating at its first harmonics
- 2024Atom by atom analysis of defect structures in doped STO
- 2023A Guideline to Mitigate Interfacial Degradation Processes in Solid‐State Batteries Caused by Cross Diffusioncitations
- 20232D and 3D STEM Imaging and Spectroscopy: Applications and Perspectives in View of Novel STEM Infrastructure
- 2023Visualizing cellulose chains with cryo scanning transmission electron microscopy
- 2023Phase analysis of (Li)FePO4 by selected area electron diffraction and integrated differential phase contrast imaging
- 2022Phase Analysis of (Li)FePO4 by Selected Area Electron Diffraction in Transmission Electron Microscopy
- 2022Oxygen-Driven Metal–Insulator Transition in SrNbO 3 Thin Films Probed by Infrared Spectroscopycitations
- 2022Oxygen-Driven Metal–Insulator Transition in SrNbO3 Thin Films Probed by Infrared Spectroscopycitations
- 2022Vanadium and Manganese Carbonyls as Precursors in Electron-Induced and Thermal Deposition Processes
- 2022Orbital mapping of the LaAlO3-TiO2 interface by STEM-EELS
- 2022Quantifying Ordering Phenomena at the Atomic Scale in Rare Earth Oxide Ceramics via EELS Elemental Mapping
- 2022In Situ Study of Nanoporosity Evolution during Dealloying AgAu and CoPd by Grazing-Incidence Small-Angle X-ray Scatteringcitations
- 2022In Situ Study of Nanoporosity Evolution during Dealloying AgAu and CoPd by Grazing-Incidence Small-Angle X-ray Scatteringcitations
- 2022Field induced oxygen vacancy migration in anatase thin films studied by in situ biasing TEM
- 2022Precursors for Direct-Write Nanofabrication with Electrons
- 2022Challenges in the characterization of complex nanomaterials with analytical STEM
- 2022Mixed-metal nanoparticlescitations
- 2022Focused Ion Beam vs Focused Electron Beam Deposition of Cobalt Silicide Nanostructures Using Single-Source Precursorscitations
- 2022A Lithium-Silicon Microbattery with Anode and Housing Directly Made from Semiconductor Grade Monocrystalline Sicitations
- 2021Post-processing paths for orbital mapping of rutile by STEM-EELS
- 2021Automatic indexing of two-dimensional patterns in reciprocal space
- 2021Pulsed laser deposition of oxide and metallic thin films by means of Nd:YAG laser source operating at its 1st harmonicscitations
- 2021The Impact of High-Tension on the Orbital Mapping of Rutile by STEM-EELS
- 2021Spectroscopic STEM imaging in 2D and 3D
- 2020Helium droplet assisted synthesis of plasmonic Ag@ZnO core@shell nanoparticlescitations
- 2020Tuning optical absorption of anatase thin lms across the visible/near-infrared spectral regioncitations
- 2020Study on Ca Segregation toward an Epitaxial Interface between Bismuth Ferrite and Strontium Titanatecitations
- 2020Ca segregation towards an in-plane compressive strain Bismuth Ferrite – Strontium Titanate interface
- 2020Unveiling Oxygen Vacancy Superstructures in Reduced Anatase Thin Filmscitations
- 2020Ultrashort XUV pulse absorption spectroscopy of partially oxidized cobalt nanoparticlescitations
- 2019Ultra-thin h-BN substrates for nanoscale plasmon spectroscopycitations
- 2019On the passivation of iron particles at the nanoscalecitations
- 2019The impact of swift electrons on the segregation of Ni-Au nanoalloyscitations
- 2019Effects of the Core Location on the Structural Stability of Ni-Au Core-Shell Nanoparticlescitations
- 2019Atomic Structure Analysis of a Second Order Ruddlesden-Popper Ferrite-a High Resolution STEM Study
- 2018Stability of Core-Shell Nanoparticles for Catalysis at Elevated Temperaturescitations
- 2017Microstructure evolution and mechanical properties of hot deformed Mg9Al1Zn samples containing a friction stir processed zonecitations
- 2017Thermally induced breakup of metallic nanowirescitations
- 2017Inclusions in Si whiskers grown by Ni metal induced lateral crystallizationcitations
- 2016Formation of bimetallic clusters in superfluid helium nanodroplets analysed by atomic resolution electron tomography
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document
Atom by atom analysis of defect structures in doped STO
Abstract
SrTiO3 (STO) is one of many complex oxide materials, which are of high interest in a<br/>plethora of technological applications due to their wide range of magnetic and electronic<br/>properties. Introducing small amounts of dopants and/or vacancies into the materials can<br/>tailor these properties over a wide range. Therefore, information about the electronic and the<br/>structural configuration of defects is essential. In metal oxides such as STO, solids are<br/>ionically bonded with many types of defects that shape the properties. 0D-defects or point<br/>defects play a major role regarding controlling and optimizing these materials. Figure 1<br/>shows different point defects in ionic compounds. The materials chosen for method<br/>development and optimization is STO, doped with low concentrations of Ta or Al. By<br/>leveraging the various modalities available in an aberration corrected STEM, such as<br/>integrated differential phase contrast (iDPC) imaging, annular dark field (ADF) imaging and<br/>core-loss electron energy loss spectroscopy (EELS), we deduce information about the<br/>distribution and defect structure of the point defects introduced by doping on an atomic level.<br/>This requires extremely thin samples (< 20 unit cells), prepared through wedge polishing.<br/>Precise thickness determination of crystalline parts will be performed by position averaged<br/>convergent beam electron diffraction (PACBED) measurements, in order to allow direct<br/>quantitative comparison with MS<br/>simulations based on atomistic<br/>modelling. Our main focus lies on<br/>the presence of O and Sr<br/>vacancies. Preliminary results<br/>obtained from STO:Ta are<br/>illustrated in Figure 2. The highangle<br/>annular dark-field (HAADF)<br/>signal demonstrates a 30%<br/>intensity increase at certain TiO<br/>atom columns, indicating the<br/>presence of Ta atoms within<br/>those positions. Additionally, a<br/>minor decrease in Sr intensities<br/>adjacent to identified dopant<br/>sites is observed, suggesting the<br/>possible existence of Sr<br/>vacancies near Ta dopants.